Here’s a recording of the session that @bielawb / Bartek Bielawski did at the previous PowerShell Deep Dive on PowerShell tracing. He explains why you would want to trace PowerShell, how to find trace sources, and how to enabling tracing for particular trace sources.
This is a live recording from European TEC 2011 PowerShell Deep Dive conference. TEC US is just around the corner – April 29 – May 2, 2012 in San Diego. Register now – this is the best PowerShell event you can find!